RDNE2024

Overview

The Radient 20A G2 ESC / SBEC (RDNE2024) is a sophisticated electronic speed controller designed specifically for RC fixed-wing aircraft pilots who demand reliable, smooth motor control without compromise. Whether you're a club pilot flying sport aircraft, an aerobatic enthusiast pushing the limits of your model, or a scale aircraft builder seeking dependable electronics, this compact controller delivers the performance and protection you need. With its integrated SBEC (Switch-Mode Battery Elimination Circuit), this ESC eliminates the need for a separate battery to power your receiver and servos, simplifying your aircraft's electrical architecture and reducing weight.

This speed controller represents the latest evolution in Radient's 32-bit programmable ESC technology, combining advanced engineering with user-friendly operation. The 20A rating makes it perfectly suited for general-purpose RC aircraft applications, motor compatibility across most market motors including high-RPM variants, and 2-4 cell LiPo battery systems. RC enthusiasts across the UK trust Radient's reputation for quality, reliability and trouble-free operation, making this an excellent choice whether you're building your first RC aircraft or upgrading an established fleet.

Measuring just 60 × 25 × 10mm and weighing only 25 grams, the compact form factor allows easy installation in tight fuselage spaces without adding unnecessary weight to your model. The pre-installed XT60 battery connector and bullet-style motor connectors mean you can integrate this ESC into your aircraft with minimal preparation, whilst the convenient LCD programming card allows you to customise settings to match your specific flying style and aircraft requirements.

Key Features

• Low-Heat Generation MOSFET with High Instant Current Capability — The advanced MOSFET design minimises heat dissipation during normal operation, ensuring the ESC remains cool and reliable even during extended flying sessions or demanding aerobatic manoeuvres. High instant current capability means the controller can respond instantly to throttle inputs, delivering smooth acceleration and precise motor control without lag or hesitation.
• Fast 32-Bit Microprocessor — The high-speed processor enables incredibly responsive throttle control and smooth power delivery. This advanced computing power ensures that every input from your transmitter is processed instantly and accurately, translating to natural, predictable aircraft handling characteristics.
• Super-Smooth Start-Up and Accurate Throttle Linearity — Rather than sudden lurching on the motor shaft, the ESC delivers gentle, progressive power delivery from zero throttle, making it safer and easier to control your aircraft during takeoff. The accurate throttle linearity means the motor response directly matches your stick position, giving you the precise control needed for smooth flying.
• Energy-Saving Efficient Operation — The intelligent MOSFET design and modern microprocessor architecture minimise power loss as heat, meaning more of your battery's energy goes towards propelling your aircraft rather than being wasted. This translates to longer flight times and cooler running temperatures throughout your battery pack.
• Multiple Protective Systems — The ESC incorporates start-up protection to prevent dangerous motor spins during power-up, over-heat protection that throttles back if temperatures rise excessively, low-voltage protection to safeguard your battery from dangerous discharge levels, and signal loss protection that cuts power if your transmitter connection is lost. Phase loss protection adds another layer of safety by detecting electrical faults.
• Programmable via LCD Card — Rather than requiring a computer or complicated programming sequences, the included LCD card makes configuration convenient and straightforward. Simply insert the card into the ESC and navigate the menu system to adjust settings such as timing, throttle curve, and protection thresholds.
• Pre-Installed XT60 Battery Connector — The XT60 connector standard on the input side means you can connect your LiPo battery directly without modification. This popular connector type is widely available, robust, and provides reliable power transfer without the need for soldering.
• Pre-Installed Bullet-Style Motor Connectors — The motor connections are already fitted and ready to go, saving you assembly time and ensuring professional-quality connections to your brushless motor. The bullet connectors provide secure, reliable contact.
• Wide Motor Compatibility — Designed to work with most motors on the market, including high-RPM applications, this ESC offers exceptional versatility. Whether you're using a 2200KV sport motor, a lower KV high-torque alternative, or anything in between, the controller delivers smooth, reliable operation.
• Integrated SBEC Power Supply — The built-in SBEC eliminates the need for a separate battery for your receiver and servos. This reduces weight, simplifies wiring, and frees up space inside your airframe for other components or additional fuel capacity.

Technical Performance

The Radient 20A G2 ESC represents a significant advancement in brushless motor control technology for RC aircraft. The 20-ampere continuous rating makes it suitable for a broad range of fixed-wing applications, from lightweight foam models to larger scale replicas. The controller is designed to work with 2-cell, 3-cell, and 4-cell LiPo battery packs, providing flexibility in your power system design depending on your desired speed and flying characteristics. The low-heat generation MOSFET design is particularly important in confined aircraft fuselages where cooling airflow is limited; by minimising resistive losses, the ESC stays cool and maintains consistent performance even during the most demanding flying conditions. The 32-bit microprocessor running at high speed ensures that throttle input is processed with minimal latency, creating responsive, natural-feeling flight characteristics that experienced pilots appreciate. Build quality is exceptional, with professional-grade components throughout, and the compact dimensions of 60 × 25 × 10mm combined with the lightweight 25-gram construction mean the ESC adds minimal weight to your aircraft. The integrated SBEC output voltage management allows the controller to efficiently convert battery voltage to a regulated supply for your receiver and servos, maximising servo performance whilst protecting sensitive electronics from voltage fluctuations. All of this engineering excellence is backed by multiple protective systems that work together to ensure safe, trouble-free operation in a wide variety of flying conditions.

What's in the Box

• Radient 20A G2 ESC / SBEC electronic speed controller
• LCD programming card for configuration and setup
• Pre-installed XT60 battery connector
• Pre-installed bullet-style motor connectors

What You Need to Complete

• 2-4 cell LiPo battery pack (2S, 3S, or 4S configuration)
• Brushless RC motor compatible with 20A ESC rating
• RC aircraft airframe and fuselage
• RC receiver compatible with your transmitter system
• Servos for control surfaces (elevator, aileron, rudder)
• RC transmitter and receiver system

Frequently Asked Questions

• Is the Radient 20A G2 ESC suitable for beginners to RC aircraft flying? — Yes, this ESC is absolutely suitable for pilots of all experience levels. The pre-installed connectors mean less soldering is required, the LCD programming card provides straightforward configuration without requiring a computer, and the multiple protection systems make it very forgiving. Club pilots and beginners particularly appreciate the smooth, predictable power delivery which makes learning aircraft control much easier. The integrated SBEC also simplifies your electrical system, reducing the number of components you need to manage.
• What battery does the Radient 20A G2 ESC require? — This ESC is designed for 2-cell, 3-cell, or 4-cell LiPo battery packs. A 2S pack (7.4 volts nominal) provides lighter weight and longer flight times but lower power, whilst a 4S pack (14.8 volts nominal) delivers maximum performance and speed. Most club pilots flying general-purpose aircraft use either 3S or 4S packs, which provide an excellent balance between performance and battery cost. Always ensure your battery pack is in good condition and properly maintained to maximise ESC lifespan.
• How does the integrated SBEC benefit my RC aircraft? — The SBEC (Switch-Mode Battery Elimination Circuit) eliminates the need to carry a separate lightweight battery specifically for powering your receiver and servos. Instead, it converts voltage from your main LiPo battery pack into a regulated supply suitable for receiver and servo operation. This saves weight, simplifies your electrical system architecture, and reduces overall cost. The SBEC output voltage can be adjusted on certain larger Radient models to maximise servo performance, ensuring your control surfaces respond with crisp authority.
• What protection systems does this ESC include? — The Radient 20A G2 provides comprehensive protection with five independent systems working together. Start-up protection prevents the motor from spinning dangerously during power-up sequences. Over-heat protection monitors ESC temperature and throttles back if it rises excessively, protecting components from damage. Low-voltage protection prevents over-discharging of your LiPo battery below safe levels, which can cause permanent damage. Signal loss protection cuts motor power immediately if your transmitter signal is lost, preventing runaway behaviour. Phase loss protection detects electrical faults in the motor or connections and responds appropriately to protect equipment.
• What makes the Radient G2 series different from other 20A ESCs available in the UK? — Radient's G2 series benefits from advanced 32-bit microprocessor technology that delivers superior throttle responsiveness compared to older 8-bit or 16-bit designs. The low-heat generation MOSFET design prioritises efficiency and reliability, keeping the controller cool even during extended flying sessions. The combination of smooth start-up, accurate throttle linearity, comprehensive protection systems, and convenient LCD programming card makes this ESC a complete solution for RC aircraft pilots. Radient's reputation for quality and reliability across their entire ESC range has been built through years of service in clubs and competition flying across the UK and beyond.
• Can I use this ESC with high-RPM motors? — Yes, the Radient 20A G2 is specifically noted as compatible with high-RPM motor applications. Whether you're using a high-KV motor designed for speed or a lower-KV high-torque variant, this ESC delivers smooth, reliable control across the entire performance range. The fast 32-bit microprocessor ensures that even with rapid motor speed changes, throttle response remains smooth and predictable.
• What are the physical dimensions and how will it fit in my aircraft? — At just 60 × 25 × 10mm and weighing only 25 grams, this ESC is remarkably compact. Most fixed-wing aircraft have sufficient space in the fuselage to accommodate the controller, and the lightweight construction means minimal impact on aircraft balance and performance. The low-profile design allows it to fit under the fuselage skin of many models, or inside the fuselage tube of larger aircraft.

Why Buy from RC Model Shop?

RC Model Shop is a trusted UK RC retailer and authorised dealer for all the brands we stock, including Traxxas, ARRMA, Losi, FTX, Hobbywing, Spektrum and more. Based in Walsall, we have a physical store where customers are welcome to come in, view products and purchase in store. Whether you are a seasoned competitor, a weekend basher, or just discovering the world of RC for the first time, our team of experienced RC enthusiasts is here to help you find the perfect setup and provide ongoing support. Order the Radient 20A G2 ESC / SBEC (2-4 Cell) RDNE2024 today with confidence, knowing you are buying from an authorised retailer with genuine products, expert knowledge and a commitment to customer satisfaction. Shop online or visit us in Walsall — we look forward to helping you get the most out of your RC experience.